Símbolo | Ag |
Número atómico | 47 |
Grupo | 11 (Metales de acuñación) |
Período | 5 |
Bloque | d |
Clasificación | Metal de transición |
Apariencia | Lustrous white metal |
Color | Plata |
Número de protones | 47 p+ |
Número de neutrones | 61 n0 |
Número de electrones | 47 e- |
Fase en STP | Sólido |
Densidad | 10.49 g/cm3 |
Peso atómico | 107.868 u |
Punto de fusión | 1234.93 K 961.78 °C 1763.204 °F |
Punto de ebullición | 2435 K 2161.85 °C 3923.33 °F |
Entalpía de vaporización | 250.63 kJ/mol |
Electronegatividad (Escala de Pauling) | 1.93 |
Afinidad electrónica | 125.862 kJ/mol |
Estado de oxidación | −2, −1, +1, +2, +3 (an amphoteric oxide) |
Energía de ionización |
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Descubrimiento | Asia Minor (5000 BC) |
Descubrimiento de plata Silver was one of the seven metals of antiquity that were known to prehistoric humans and whose discovery is thus lost to history. But probably silver was discovered in Asia Minor shortly after copper and gold. In particular, the three metals of group 11, copper, silver, and gold, occur in the elemental form in nature and were probably used as the first primitive forms of money as opposed to simple bartering. However, unlike copper, silver did not lead to the growth of metallurgy on account of its low structural strength, and was more often used ornamentally or as money. |